116109661 has 4 divisors (see below), whose sum is σ = 116332192. Its totient is φ = 115887132.

The previous prime is 116109629. The next prime is 116109671. The reversal of 116109661 is 166901611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 116109661 - 2⁵ = 116109629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116109671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110481 + ... + 111526.

It is an arithmetic number, because the mean of its divisors is an integer number (29083048).

Almost surely, 2^116109661 is an apocalyptic number.

It is an amenable number.

116109661 is a deficient number, since it is larger than the sum of its proper divisors (222531).

116109661 is an equidigital number, since it uses as much as digits as its factorization.

116109661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222530.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 116109661 is about 10775.4192957861. The cubic root of 116109661 is about 487.8535306307.

The spelling of 116109661 in words is "one hundred sixteen million, one hundred nine thousand, six hundred sixty-one".